fix(otel): Avoid deadlock in SentryContextStorage.root() with virtual threads (#5234)

* fix(otel): Avoid deadlock in SentryContextStorage.root() with virtual threads

SentryContextStorage.root() called SentryContextWrapper.wrap() which
triggers scope.clone() and acquires locks. Under virtual threads,
ReentrantLock.unlock() can re-enter root() via OpenTelemetry executor
instrumentation on ForkJoinPool.execute(), causing a deadlock.

Return the default OTel root context without wrapping. Scopes are
resolved later via attach() or Sentry.getCurrentScopes().

Fixes GH-5226
Co-Authored-By: Claude <noreply@anthropic.com>

* changelog

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: adinauer

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Fixes
+
+- Fix deadlock in `SentryContextStorage.root()` with virtual threads and OpenTelemetry agent ([#5234](https://github.com/getsentry/sentry-java/pull/5234))
+
 ## 8.37.0
 
 ### Fixes

sentry-opentelemetry/sentry-opentelemetry-bootstrap/src/main/java/io/sentry/opentelemetry/SentryContextStorage.java

@@ -41,6 +41,9 @@ public Context current() {
 
   @Override
   public Context root() {
-    return SentryContextWrapper.wrap(ContextStorage.super.root());
+    // Don't wrap() here — it triggers scope.clone() which acquires locks. Under virtual
+    // threads, lock.unlock() can re-enter here via OpenTelemetry executor instrumentation, causing
+    // a deadlock.
+    return ContextStorage.super.root();
   }
 }